Saw-handle.



.I. L. WHITWORTH.

SAW HANDLE.

APPLlCATlON FILED FEB. 10, 19!?- Patented July 24, 1917.

'l/Illlllllll Attorneys UNTTD @TATE2 PATENT Flfi.

JOHN LUTHER WHI'IWORTH, OF BROWNSVILLE, TEXAS.

SAW-HANDLE.

Application filed February 10, 1917.

To all whom it may concern.

Be it known that 1, JOHN L. lVrn'rwoRrn, a citizen of the United States, residing at Brownsville, in the county of Cameron and State of Texas, have invented a new and useful Saw-Handle,, of which the following is a specification.

The device forming the subject matter of this application is a saw handle, and the invention aims, broadly, to provide novel means, housed within the handle, whereby a blast of air may be directed toward the teeth of the saw, to remove the dust produced when the saw is operated.

The invention aims, further, to provide novel means whereby a compressible element located within the handle, may be actuated, to produce the blast.

It is within the province of the disclosure to improve generally and to enhance the utility of devices of that type to which the present invention appertains.

With theabove and other objects in view which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed can be made with in the scope of what is claimed, without departing from the spirit of the invention.

In the accompanying drawings Figure 1 shows in longitudinal section, a saw handle embodying the present improvements, parts appearing in elevation;

Fig. 2 is a section on the line 2-2 of Fig. 1; and

Fig. 8 is a section on the line 3-3 of Fig. 1.

The invention comprises a casing which preferably is made of metal, the casing ineluding a top 1, a bottom 2 and side walls 3. The side walls 3 are connected by a loopshaped member 4, defining a hand hole 5. Mounted between the top 1 and the bottom 2, and between the side walls 3, at the rear end of the handle is a palm block 6 held in place by a bolt 7, one end of which may be threaded into a lug 8 formed on the bot tom 2, the palm block 6 being provided in its forward edge with a slot 8, receiving the lug 8, the object in view being to permit the palm block 6 to be pushed into the casing. Mounted in the forward end of the casing is a bifurcated block 9 held in place by Specification of Letters Patent.

Patented July 24., 1917.

Serial No. 147,905.

means of securing elements 10, engaging the side walls 8 of the casing. The bifurcated block 9 receives a saw blade 12, and the saw blade 12 is held in the bifurcated block by any suitable means indicated at 11. The teeth of the blade 12 are shown at 1 1.

In the bottom 2 of the casing is formed an opening 15. A blast nozzle 16 extends through the opening 15 and is secured to the bottom 2. The blast nozzle 16 preferably is of rigid construction. The forward end of the blast nozzle 16 discharges adjacent the teeth 14: of the blade 12. The rear end of the blast nozzle 16 is extended toward the top 2, within the contour of the casing, as shown at 17. The end 17 of the blast nozzle carries a coupling 18 adapted to receive the stem 19 of a bulb 19 which abuts against the palm block 6.

Mounted in the side walls 3 of the casing is a pivot element 20 passing through rear- Wardly projecting ears 21 formed on a lever 22 which bears against the bulb 19. The lever 22 thus is fulcrumed for swinging movement on the pivot element 20. The lever 22 has forwardly projecting ears 23 receiving a pivot element 24 supporting the rear end of the pressure bar 25 passing through an opening 25 formed in the rear wall of the loop-shaped member 1 which defines the hand hole 5. The forward end of the pressure bar 25 carries a suitably shaped finger piece 26 located in the hand hole 5. On its forward face, the lever 22 is provided with an eye 27 receiving one end of a retractile spring 28, the other end of which is mounted on a projection 29 carried by the top 1 of the casing.

When the bar 25 is pushed rearwardly, by digital pressure applied to the finger piece 26, the lever 22 will be swung rearwardly on its fulcrum 20, and the bulb 19 will be compressed, causing a blast of air to traverse the nozzle 16, the dust produced by the teeth 14 of the blade 12 being blown away. When the lever 22 is swung rearwardly as hereinbefore stated the spring 28 is put under slight tension. When pressure on the finger piece 26 is relieved, the spring 28 tends to swing the lever 22 forwardly, the bulb 19 expanding automatically. The function of the spring 28 is to retract the lever 22, and thus permit the bulb 19 to expand readily, with out causing the bulb to swing the lever 22 forwardly, when pressure on the finger piece 26 is relieved. The bulb 19 may be equipped at its rear end with the usual valve 35 constituting a part of bulbs of this kind. Owing to the presence of the valve 35, it is unnecessary for the bulb to suck air backwardly through the nozzle 16, when pressure on the finger piece 26 is relieved.

The opening 25 in which the pressure bar 25 moves acts as a vent, admitting enough air to the interior of the casing, to supply the bulb 19 when the same is released.

The back wall of the loop-shaped member 4: may be provided with a slot 100. Ex tended through the slot 100 and movable therein in a direction parallel to the blade 12 is a stem 101 provided at its inner end with a button 102 and equipped at its outer end with a detent 103 having an offset extension 104. The finger piece 26 may be pushed back against the rear wall of the member 4: and the detent 103 may be pushed forwardly until the extension 101 overhangs one end of the finger piece 26, to hold the same retracted and to prevent an encumbering of the hand-hole 5 when it is not desired to use the blast mechanism.

Having thus described the invention, what is claimed is 1. In a device of the class described, a hollow casing provided with a hand hole; a blade assembled with the casing; a nozzle carried by the casing and discharging adj acent the blade; a compressible member assembled with the nozzle and located within the casing; a lever fulcrumed in the casing and bearing on the compressible member and a pressure element disposed substantially at right angles to the lever and having its innor end pivoted to the lever, the outer end of the pressure element projecting into the hand hole.

2. In a device of the class described, a hollow casing; a palm block mounted in one end of the casing; a saw blade mounted in the other end of the casing; a nozzle carried by the casing and discharging adjacent the blade; a compressible member connected with the nozzle and abutting against the palm block; a lever fulcrumed on the casing and engaging the compressible member; and a compression element connected with the lever, one end of the compression element being forwardly extended, the casing being provided with a hand hole into which said end of the compression element extends.

3. In a device of the class described, a hollow casing provided with a hand hole; a blade assembled with the casing; a nozzle carried by the casing and discharging adjacent the blade; a compressible member within the casing and communicating with the nozzle; a lever fulcrumed on the casing and bearing against the compressible member; a spring assembled with the lever and with the casing and constituting means for retracting the lever with respect to the compressible member, and an actuating element connected at one end with the lever, the other end of the actuating element projecting intothe hand hole.

4. In a device of the class described, a hollow casing including a loop-shaped mem ber defining a hand-hole; a saw blade assembled with the casing; a blast nozzle car ried by the casing and discharging adjacent the saw blade; a compressible member in the casing and connected to the nozzle; a casingcarried means for operating the compressible member, and including a part projecting through the loop-shaped member into-the hand-hole; and a detent mounted to move on the loop-shaped member, within the handhole, and coacting with said part-of the casing-carried means,'to hold said part retracted, thereby 'to prevent an encumbering of the hand-hole.

In testimony that I claim the foregoing Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents.

Washington. I). G. i 

